Introduction Pterostilbene is a chemical classified as a benzylidene compound (more specifically a stilbene) and is biologically classified as a phytoalexin, which are antimicrobial substances that are part of the plant’s defense system and are synthesized in response to pathogen infection. This monograph focuses on trans-pterostilbene. Stilbenes are low molecular weight (approximately 200-300 ...

Several stilbenes and styrenes have been treated with heteropolyacid] (HPA) supported over silice. The compounds obtained were characterized by H and 13 CNMR and the yields were compared with those obtained using H2SO4 (c) and ethyl poliphosphate] (PPE). Introduction The cyclodimerization of stilbenes and styrenes with acid reagents have been thoroughly descripte in the literature. We have obse...

Accurate localization of phytoalexins is a key for better understanding their role. This work aims to localize stilbenes, the main phytoalexins of grapevine. The cellular localization of stilbene fluorescence induced by Plasmopara viticola, the agent of downy mildew, was determined in grapevine leaves of very susceptible, susceptible, and partially resistant genotypes during infection. Laser sc...

Blue light-emitting phosphorus and silicon-bridged stilbenes have been synthesized and characterized. The organic light-emitting diodes (OLEDs) fabricated with these compounds demonstrate that this new type of phospholes is a promising material for deep blue fluorescence emitters.

The genome of the ascomycete Neurospora crassa encodes CAO-1 and CAO-2, two members of the carotenoid cleavage oxygenase family that target double bonds in different substrates. Previous studies demonstrated the role of CAO-2 in cleaving the C40 carotene torulene, a key step in the synthesis of the C35 apocarotenoid pigment neurosporaxanthin. In this work, we investigated the activity of CAO-1,...

In accordance with Commission Decision 2002/657/EC, confirmatory methods for the detection of prohibited substances should comply with specific requirements, including the criteria for confirmation. Two strategies: multiple reaction monitoring (MRM) and enhanced product ion (EPI) scanning functions were compared for confirming the anabolic compounds from synthetic stilbenes group in bovine urin...

Grapevine stilbenes are a family of polyphenols which derive from trans-resveratrol having antifungal and antimicrobial properties, thus being considered as phytoalexins. In addition to their diverse bioactive properties in animal models, they highlight a strong potential in human health maintenance and promotion. Due to this relevance, highly-specific qualitative and quantitative methods of an...

Resveratrol and its derivatives are natural stilbenes associated with many health benefits that include those conferred by their antioxidant and anticancer properties. While stilbenes can be recovered as an extract from a selected number of plants, these products are not suitable for many applications in the food/pharmaceutical sectors due to high levels of impurities as well as the overall low...